diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index c1eaaa5..dadee86 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -12,12 +12,14 @@ jobs:
            sudo apt-get -qy update
            sudo apt-get -qfy install wget ca-certificates
            wget -q https://apertium.projectjj.com/apt/install-nightly.sh -O - | sudo bash
-           sudo apt-get -qfy install --no-install-recommends build-essential cmake lttoolbox-dev pkg-config libxml2-dev
-    - name: cmake
-      run: cmake .
+           sudo apt-get -qfy install --no-install-recommends build-essential autoconf autotools-dev lttoolbox-dev pkg-config libxml2-dev
+    - name: autoreconf
+      run: autoreconf -fvi
+    - name: configure
+      run: ./configure
     - name: build
-      run: cmake --build . -v -j 4
+      run: make -j4 V=1 VERBOSE=1
     - name: tests
-      run: ctest -V
+      run: make test
     - name: make install
-      run: sudo cmake --install .
+      run: sudo make install
diff --git a/.gitignore b/.gitignore
index 9ee8345..d038cb6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,17 @@ apertium-anaphora
 CTestTestfile.cmake
 Testing/
 apertium-validate-anaphora
+INSTALL
+Makefile.in
+aclocal.m4
+autom4te.cache
+build
+configure
+depcomp
+install-sh
+missing
+src/Makefile.in
+config.log
+config.status
+.deps
+*.o
diff --git a/.travis.yml b/.travis.yml
index 886a394..201ecc3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,12 +6,13 @@ compiler:
 
 before_install:
   - wget https://apertium.projectjj.com/apt/install-nightly.sh -O - | sudo bash
-  - sudo apt-get install -qfy build-essential cmake lttoolbox-dev pkg-config libxml2-dev
+  - sudo apt-get install -qfy build-essential autoconf autotools-dev lttoolbox-dev pkg-config libxml2-dev
 
 script:
   - $CXX --version
   - export V=1 VERBOSE=1
-  - cmake .
-  - cmake --build . -j 4
-  - ctest -V
-  - cmake --install .
+  - autoreconf -fvi
+  - ./configure
+  - make -j4
+  - make test
+  - sudo make install
diff --git a/CMakeLists.txt b/CMakeLists.txt
deleted file mode 100644
index 61661c0..0000000
--- a/CMakeLists.txt
+++ /dev/null
@@ -1,83 +0,0 @@
-set(CMAKE_LEGACY_CYGWIN_WIN32 0)
-cmake_minimum_required(VERSION 3.0 FATAL_ERROR)
-project(apertium-anaphora
-	VERSION 1.0.0
-	LANGUAGES CXX
-	)
-set(VERSION ${PROJECT_VERSION})
-
-# Release or Debug
-if(NOT CMAKE_BUILD_TYPE)
-	set(CMAKE_BUILD_TYPE "Release")
-endif()
-
-set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
-set(CMAKE_POSITION_INDEPENDENT_CODE ON)
-set(CMAKE_MACOSX_RPATH ON)
-
-option(BUILD_SHARED_LIBS "Set to OFF to use static library" ON)
-
-include(GNUInstallDirs)
-
-if(MSVC)
-	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /utf-8 /permissive- /W4 /MP")
-	set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} /O2")
-	set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG")
-else()
-	set(_FLAGS_COMMON "-Wall -Wextra -Wno-missing-field-initializers -Wno-deprecated -Wno-unused-parameter -fPIC")
-
-	include(CheckCXXCompilerFlag)
-
-	foreach(flag "-Wno-unused-result" "-flto")
-		string(REGEX REPLACE "[^A-Za-z0-9]" "-" _flag ${flag})
-		CHECK_CXX_COMPILER_FLAG(${flag} COMPILER_SUPPORTS_${_flag})
-		if(COMPILER_SUPPORTS_${_flag})
-			set(_FLAGS_COMMON "${_FLAGS_COMMON} ${flag}")
-		endif()
-	endforeach()
-	if(COMPILER_SUPPORTS_flto)
-		set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} -flto")
-	endif()
-
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${_FLAGS_COMMON} -fvisibility-inlines-hidden")
-
-	# Require latest possible C++ standard
-	foreach(flag "-std=c++20" "-std=c++2a" "-std=c++17" "-std=c++1z" "-std=c++14" "-std=c++1y")
-		string(REGEX REPLACE "[^a-z0-9]" "-" _flag ${flag})
-		CHECK_CXX_COMPILER_FLAG(${flag} COMPILER_SUPPORTS_${_flag})
-		if(COMPILER_SUPPORTS_${_flag})
-			set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}")
-			set(_ENABLED_CXX ${flag})
-			break()
-		endif()
-	endforeach()
-	if(NOT _ENABLED_CXX)
-		message(FATAL_ERROR "Could not enable at least C++1y (C++14) - upgrade your compiler")
-	endif()
-
-	# Generate pkg-config file
-	set(prefix ${CMAKE_INSTALL_PREFIX})
-	configure_file(apertium-anaphora.pc.in apertium-anaphora.pc @ONLY)
-	install(FILES "${CMAKE_CURRENT_BINARY_DIR}/apertium-anaphora.pc" DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig/")
-endif()
-
-find_package(PkgConfig REQUIRED)
-
-pkg_search_module(LIBXML2 REQUIRED libxml-2.0)
-include_directories(${LIBXML2_INCLUDE_DIRS})
-link_directories(${LIBXML2_LIBRARY_DIRS})
-
-pkg_search_module(LTTOOLBOX REQUIRED lttoolbox)
-include_directories(${LTTOOLBOX_INCLUDE_DIRS})
-link_directories(${LTTOOLBOX_LIBRARY_DIRS})
-
-if(WIN32)
-	add_definitions(-D_SECURE_SCL=0 -D_ITERATOR_DEBUG_LEVEL=0 -D_CRT_SECURE_NO_DEPRECATE -DWIN32_LEAN_AND_MEAN -DVC_EXTRALEAN -DNOMINMAX)
-endif()
-
-add_subdirectory(src)
-
-enable_testing()
-add_test(NAME tests
-	COMMAND "${CMAKE_CURRENT_SOURCE_DIR}/tests/test.sh" $<TARGET_FILE:apertium-anaphora>
-	WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/tests)
diff --git a/ChangeLog b/ChangeLog
new file mode 100644
index 0000000..e69de29
diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 0000000..b3e66c6
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1,9 @@
+pkgconfigdir = $(libdir)/pkgconfig
+dist_pkgconfig_DATA = apertium-anaphora.pc
+
+SUBDIRS = src
+
+EXTRA_DIST=autogen.sh
+
+test:
+	pushd $(abs_srcdir)/tests/ && bash test.sh $(abs_builddir)/src/apertium-anaphora && popd
diff --git a/NEWS b/NEWS
new file mode 100644
index 0000000..e69de29
diff --git a/README b/README
index d48766f..ad9602d 100644
--- a/README
+++ b/README
@@ -1,13 +1,13 @@
 # Apertium Anaphora Resolution
-## Google Summer of Code 2019
+
 [![Build Status](https://travis-ci.com/apertium/apertium-anaphora.svg?branch=master)](https://travis-ci.com/apertium/apertium-anaphora)
 
 ### Documentation
 http://wiki.apertium.org/wiki/Anaphora_Resolution_Module
 
 ### How to Run
-- `./cmake.sh`
-- `make -j4`
+- `./autogen.sh [--prefix=/path/to/your/prefix]`
+- `make`
 - `sudo make install`
 - Usage: `apertium-anaphora [-z] apertium-xxx-yyy.xxx-yyy.arx [input [output]]`
 
@@ -26,3 +26,7 @@ http://wiki.apertium.org/wiki/Anaphora_Resolution_Module
 This package is licensed under the [GNU General Public License](https://www.gnu.org/licenses/licenses.html#GPL) as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
 
 If it becomes necessary, we are open to dual-licensing the package under the [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0).
+
+### Acknowledgements
+
+Google Summer of Code 2019
diff --git a/autogen.sh b/autogen.sh
new file mode 100755
index 0000000..f9f430a
--- /dev/null
+++ b/autogen.sh
@@ -0,0 +1,35 @@
+#! /bin/sh
+
+# If the user specified a --prefix, take that, otherwise /usr/local/
+# is the default.
+PREFIX=/usr/local
+prefixnext=false
+for i in "$@"; do
+    case $i in
+        --prefix=*)		# equals separated:
+	    PREFIX="${i#*=}"
+	    ;;
+        --prefix)		# space separated:
+	    prefixnext=true
+	    ;;
+        *)
+	    $prefixnext && PREFIX="$i" && prefixnext=false
+	    ;;
+    esac
+done
+
+# Set the paths needed by libtool/pkg-config/aclocal etc. By inferring
+# them based on --prefix , users don't have to edit ~/.bashrc. We only
+# append, so if a user has some other preference, that will override.
+PATH="${PATH}:/usr/local/bin"
+export PATH
+LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${PREFIX}/lib"
+export LD_LIBRARY_PATH
+PKG_CONFIG_PATH="${PKG_CONFIG_PATH}:${PREFIX}/share/pkgconfig:${PREFIX}/lib/pkgconfig"
+export PKG_CONFIG_PATH
+ACLOCAL_PATH="${ACLOCAL_PATH}:${PREFIX}/share/aclocal"
+export ACLOCAL_PATH
+
+
+# Pass on all args to configure
+autoreconf -fi && ./configure "$@"
diff --git a/cmake.sh b/cmake.sh
deleted file mode 100755
index df59f07..0000000
--- a/cmake.sh
+++ /dev/null
@@ -1,29 +0,0 @@
-#!/usr/bin/env bash
-set -e
-args=()
-
-while [[ $# > 0 ]];
-do
-	case "$1" in
-	--prefix)
-		args+=("-DCMAKE_INSTALL_PREFIX=$2")
-		shift 2
-		;;
-	--prefix=*)
-		args+=("-DCMAKE_INSTALL_PREFIX=${1#*=}")
-		shift
-		;;
-	*)
-		args+=("$1")
-		shift
-		;;
-	esac
-done
-
-set -- "${args[@]}"
-
-echo "- rm -rf CMake caches"
-rm -rf install_manifest.txt CMakeCache.txt *.cmake CMakeFiles src/CMakeFiles src/*.cmake _CPack_Packages Testing
-echo "- cmake " "$@" "."
-cmake "$@" .
-echo "- You may now perform: make -j3"
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..7e13fb1
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,54 @@
+AC_PREREQ(2.61)
+
+AC_INIT([apertium-anaphora], [1.0.0], [khanna.tanmai@gmail.com])
+AM_INIT_AUTOMAKE
+AC_CONFIG_MACRO_DIR([m4])
+
+AC_PROG_CXX
+AM_SANITY_CHECK
+AC_LANG_CPLUSPLUS
+
+CFLAGS="-Wall -Wextra $CFLAGS"
+CXXFLAGS="-Wall -Wextra $CXXFLAGS"
+
+PKG_CHECK_MODULES([LTTOOLBOX], [lttoolbox >= 3.5.2])
+AC_SUBST(LTTOOLBOX_CFLAGS)
+AC_SUBST(LTTOOLBOX_LIBS)
+
+PKG_CHECK_MODULES([LIBXML], [libxml-2.0])
+AC_SUBST(LIBXML_CFLAGS)
+AC_SUBST(LIBXML_LIBS)
+
+CPPFLAGS="$CPPFLAGS $CFLAGS $LTTOOLBOX_CFLAGS $LIBXML_CFLAGS"
+LIBS="$LIBS $LTTOOLBOX_LIBS $LIBXML_LIBS"
+
+# Checks for highest supported C++ standard
+AC_LANG(C++)
+AX_CHECK_COMPILE_FLAG([-std=c++20], [CXXFLAGS="$CXXFLAGS -std=c++20"], [
+ AX_CHECK_COMPILE_FLAG([-std=c++2a], [CXXFLAGS="$CXXFLAGS -std=c++2a"], [
+  AX_CHECK_COMPILE_FLAG([-std=c++17], [CXXFLAGS="$CXXFLAGS -std=c++17"], [
+   AX_CHECK_COMPILE_FLAG([-std=c++1z], [CXXFLAGS="$CXXFLAGS -std=c++1z"], [
+    AX_CHECK_COMPILE_FLAG([-std=c++14], [CXXFLAGS="$CXXFLAGS -std=c++14"], [
+     AX_CHECK_COMPILE_FLAG([-std=c++1y], [CXXFLAGS="$CXXFLAGS -std=c++1y"], [])
+    ])
+   ])
+  ])
+ ])
+])
+
+AC_PATH_PROG(BASH, bash, no)
+if test x$ac_cv_path_BASH = x
+then
+  AC_MSG_ERROR([You don't have bash installed.])
+fi
+if test x$ac_cv_path_BASH = xno
+then
+  AC_MSG_ERROR([You don't have bash installed.])
+fi
+
+AC_CONFIG_FILES([
+                 apertium-anaphora.pc
+                 Makefile
+                 src/Makefile
+                 ])
+AC_OUTPUT
diff --git a/m4/ax_check_compile_flag.m4 b/m4/ax_check_compile_flag.m4
new file mode 100644
index 0000000..51df0c0
--- /dev/null
+++ b/m4/ax_check_compile_flag.m4
@@ -0,0 +1,74 @@
+# ===========================================================================
+#   http://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
+#
+# DESCRIPTION
+#
+#   Check whether the given FLAG works with the current language's compiler
+#   or gives an error.  (Warnings, however, are ignored)
+#
+#   ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
+#   success/failure.
+#
+#   If EXTRA-FLAGS is defined, it is added to the current language's default
+#   flags (e.g. CFLAGS) when the check is done.  The check is thus made with
+#   the flags: "CFLAGS EXTRA-FLAGS FLAG".  This can for example be used to
+#   force the compiler to issue an error when a bad flag is given.
+#
+#   INPUT gives an alternative input source to AC_COMPILE_IFELSE.
+#
+#   NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
+#   macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
+#   Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
+#
+#   This program is free software: you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation, either version 3 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 3
+
+AC_DEFUN([AX_CHECK_COMPILE_FLAG],
+[AC_PREREQ(2.59)dnl for _AC_LANG_PREFIX
+AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl
+AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [
+  ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
+  _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1"
+  AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
+    [AS_VAR_SET(CACHEVAR,[yes])],
+    [AS_VAR_SET(CACHEVAR,[no])])
+  _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags])
+AS_IF([test x"AS_VAR_GET(CACHEVAR)" = xyes],
+  [m4_default([$2], :)],
+  [m4_default([$3], :)])
+AS_VAR_POPDEF([CACHEVAR])dnl
+])dnl AX_CHECK_COMPILE_FLAGS
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
deleted file mode 100644
index 5d21c57..0000000
--- a/src/CMakeLists.txt
+++ /dev/null
@@ -1,17 +0,0 @@
-add_executable(apertium-anaphora
-	pattern_arx.cc
-	parse_arx.cc
-	parse_biltrans.cc
-	score.cc
-	anaphora.cc
-	)
-target_link_libraries(apertium-anaphora PRIVATE
-	xml2
-	lttoolbox3
-	)
-
-install(TARGETS apertium-anaphora DESTINATION ${CMAKE_INSTALL_BINDIR})
-
-configure_file(apertium-validate-anaphora.in apertium-validate-anaphora @ONLY)
-install(FILES anaphora.dtd DESTINATION "${CMAKE_INSTALL_DATADIR}/apertium-anaphora/")
-install(PROGRAMS "${CMAKE_CURRENT_BINARY_DIR}/apertium-validate-anaphora" DESTINATION ${CMAKE_INSTALL_BINDIR})
diff --git a/src/Makefile.am b/src/Makefile.am
new file mode 100644
index 0000000..8e78d65
--- /dev/null
+++ b/src/Makefile.am
@@ -0,0 +1,24 @@
+AM_LDFLAGS=$(LIBS)
+
+bin_PROGRAMS = apertium-anaphora
+bin_SCRIPTS = apertium-validate-anaphora
+
+apertium_anaphora_SOURCES = \
+	anaphora.cc \
+	parse_arx.cc \
+	parse_biltrans.cc \
+	pattern_arx.cc \
+	score.cc
+
+apertium_anaphoradir = $(prefix)/share/apertium-anaphora
+apertium_anaphora_DATA = anaphora.dtd
+
+apertium-validate-anaphora: Makefile.am validate-header.sh
+	@echo "Creating apertium-validate-anaphora script"
+	@echo "#!$(BASH)" > $@
+	@cat $(abs_srcdir)/validate-header.sh >> $@
+	@echo "xmllint --dtdvalid \"$(apertium_anaphoradir)\"/anaphora.dtd --noout \"\$$FILE1\"" >>$@
+	@chmod a+x $@
+
+EXTRA_DIST = anaphora.dtd
+CLEANFILES = $(bin_SCRIPTS)
diff --git a/src/apertium-validate-anaphora.in b/src/validate-header.sh
old mode 100755
new mode 100644
similarity index 62%
rename from src/apertium-validate-anaphora.in
rename to src/validate-header.sh
index be84ef6..07a95d2
--- a/src/apertium-validate-anaphora.in
+++ b/src/validate-header.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+
 if [[ $# != 1 ]]; then
     echo "USAGE: $(basename "$0") <input_file>"
     exit 1
@@ -11,4 +11,3 @@ if [[ ! -e "$FILE1" ]]; then
     exit 1
 fi
 
-xmllint --dtdvalid @CMAKE_INSTALL_FULL_DATADIR@/apertium-anaphora/anaphora.dtd --noout "$FILE1"